If one reads a lot of children's books, it is obvious that X is a real thorn in the side for those authors looking to have each letter of the alphabet represented in their books. Most of them either ...

I saw a spelling mistake on an SO question: submittion. That got me wondering, is there a name for the shift of ‑mit‑ to ‑miss‑ in submission, permission, admission and so on? Are there other patterns ...